Wiring Diagrams It is important to match the speaker load with your amplifier's output impedance for a couple of reasons. One reason is that you will get maximum transfer of power.
DIY: How to Install Speakers in a 4x12 Cab, Part 1 - Duration: 17:40. Premier Guitar 155,745 views
Marshall 4x12 Wiring in Series - Parallel Four 16 ohm speakers = 16 ohms total load Four 8 ohm speakers = 8 ohms total load Red wires are positive Black wires are negative Position speaker terminals in towards the center of the cab
The diagram below shows the wiring of a Marshall ® 2x12" speaker cab having a Mono/Stereo selection switch and two specialized input jacks. When the Mono/Stereo switch is set to "Mono", the two 8Ω speakers are wired either in series (making a 16Ω cab) or in parallel (making a 4Ω cab), depending on which jack you use.
The 4x12 cabinet is sometimes referred to as a half-stack, and players routinely connect two of them to a single amp to create a full stack. A 4x12 cab is typically 16 ohms, so when you connect two of them together in parallel, the total load becomes 8 ohms. Most amplifiers on the planet can run an 8-ohm load, so this is desirable.
There are two ways you can wire a 4x12 (or 4x10 for that matter), the main one is Series/Parallel: 4 X 8 Ohm Speaker = 8 Ohm Load; 4 X 16 Ohm Speaker = 16 Ohm Load Back to Guitar Tech Celestion, Unit 111 Claydon Business Park, Great Blakenham, Ipswich, IP6 0NL United Kingdom